In Hillary Clinton's Between Two Ferns appearance, host Zach Galifianakis looks at the Democratic presidential candidate and asks her how quickly she can type and how President Obama likes his coffee. "Like himself—weak?"

She gives him a venomous side-eye and gently scolds him for asking some dated questions. But her timing, given the tricky balance of awkward and funny, is perfect. Also, it turns out, this was all improvised.

It actually was not much of a vetting process. When we do these we prefer to do them with a lot of improvisation, where the interviewee doesn't know what the questions are beforehand, so the campaign was pretty cool about that. In this one, actually, the majority of it was improvised.

Given her responses and demeanor while getting roasted by Galifianakis, it's clear that she understands the tone of the show. Yesterday, we asked if people would think she's being a good sport, if she would send the right message, if this would actually connect with young voters. And this detail—that she did all of this on the spot—says more about her personality. She can handle any situation if she can take racist and sexist joke questions to her face. Also, what's telling, is that this appearance was all her idea.

Back in August we heard that there was interest. What we later found out was that she was the one who suggested doing it. Half the time the person being interviewed reaches out personally ... we heard that there was interest from Hillary Clinton, but we started taking it seriously when we heard, "Oh no, it's her idea and if you say, 'yes,' it'll actually happen."

Also, she was suffering from pneumonia when they filmed the video on Sept. 9.